Weary travelers have a new option for easing the pain of a long layover in one of the world's worst airports: Yotel, a low-cost, high-concept "pod hotel" inspired by first-class airline cabins, opens today in Terminal 4 of London's Heathrow.

Cover songs cover all the bases. Some obliterate the originals (Jimi Hendrix's plunder of Bob Dylan's All Along the Watchtower); others massacre them (American Idol reject William Hung's deplorable take on Ricky Martin's She Bangs). Lately, artists have been filling entire albums with retooled tunes. USA TODAY's music critics review an eclectic cross section.